Hello everyone, I would like to start doing some lower level development with Ruby, so I started by building Ruby 1.8.5 under windows using Visual-C 8. That went smoothly, so my first test after installing Ruby was to install Gems, so that I could add some packages I need. That also seemed to work, until I tried running "gem". Any invocation of gem returns the following errors: C:/usr/local/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:27:in `gem_original_require': no such file to load -- zlib (LoadError) from C:/usr/local/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:27:in `require' from C:/usr/local/lib/ruby/site_ruby/1.8/rubygems/package.rb:9 from C:/usr/local/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:27:in `gem_original_require' from C:/usr/local/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:27:in `require' from C:/usr/local/lib/ruby/site_ruby/1.8/rubygems/builder.rb:7 from C:/usr/local/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:27:in `gem_original_require' from C:/usr/local/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:27:in `require' from C:/usr/local/lib/ruby/site_ruby/1.8/rubygems.rb:93:in `manage_gems' from C:/usr/local/bin/gem:10 I tried uncommenting zlib in ruby-1.8.5/ext/Setup.nt and rebuilding from scratch (after "nmake clean"), but that made no difference, and I could see no sign that zlib was actually built. What step am I missing? Also I wonder what's the right way to add an extention to a build under Windows/Visual C-8. And thanks, in advance, to everyone for their help. Josh Scholar